I dunno much about the girl side but the guy side, from what I heard, went in too deep before getting to know girl got boyfriend. And when he knows, he already 1 foot in. And thinking that the girl actually complaining about the boyfriend makes him feel he may have a chance to this.

Also, I do wanna ask this since I am curious myself, why did the girl suddenly ask him "Why are you treating me so good like boyfriend?" and then ghost him for 2 days+ then come back and find him again? So weird.

Now the superior says to his close friends that the girl in question is actually gazing at him when they are working and when he looks at her, she twirls and plays with her hair.